From [url=http://www.http://aoc-translations.tumblr.com]AOC Translations![/url]:
She’s had top grades ever since her first year. The all perfect student body president, Watanuki Layla has a secret. Her family runs a Love Hotel!?
While desperately trying to protect this secret, has she been found by the new treasurer, Sangatsu Owaru…!?

From KuroUsagi Translations:

"The top of her grade year round and all too perfect student council president who repels everyone, Watanuki Leila, has a secret. Her family's home is a love hotel!? While desperately trying to hide that fact, Sangatsu Owaru the new treasurer has accidently leaked it?'

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From AnimeNewsNetwork:

The romantic comedy centers on the beautiful and witty high school student Leila Watanuki. She and others around her notice her fastidiousness. One day, Watanuki disguises herself as the lovable male classmate Owaru Sangatsu. Leila faces new challenges as she continues the experiment and sees life from a different perspective.

The series Watanuki-san ni wa Boku ga Tarinai has been licensed, it is not available in Manga Fox.